David Letterman is not the only person with a Top Ten List.  The EFF, aka Electronic Frontier Foundation:  "Defending Freedom in the Digital World", has a Patent Busting Project underway with a Top Ten list.  Wired News says in the article entitled EFF Publishes Patent Hit List:

The Electronic Frontier Foundation is spoiling for a fight, and on Wednesday it named the top 10 patents it wants killed, or at least redefined.

Two of the ten "threatening" patents owners the EFF has singled out include radio titan Clear Channel and beloved video game maker Nintendo.

"These patent owners have been threatening people that just can't defend themselves," said Jason Schultz, staff attorney at the EFF. "They're trying to claim ownership over some fundamental part of software of the Internet that people use every day, and they're threatening small companies or individuals that can't afford lawyers."